regcache (Re: GDB respin)

[Michal Ludvig]

Michal Ludvig wrote:
>> I'm about to convert x86-64 target to use regcache, but am not sure 
>> what must be done for it. Could someone please briefly explain me what 
>> is regcache all about and what must be changed in order to have the 
>> target regcache-compilant?
> 
> Where previously the code wrote (directly or implicitly) to a global 
> buffer, it how is given an explicit object (the regcache).
> 
> You can use any *cooked*{read,write}* function you want in regcache.h. 
> Typically the transformation is very direct: write_register() -> 
> regcache_cooked_write().
> 
>> As I was looking to the sources I believe, that only 
>> x86_64_store_return_value() and x86_64_extract_return_value() must be 
>> modified. Am I right or not?
> 
> Per above, yes, I think this is correct.  Thanks!

OK, here is the first attempt to use regcache on x86-64 target.
As I run the testsuite on gdb-5.3 it made no difference on the results 
and I hope it will improve the mainline a little bit.

Is the patch OK to commit?

Michal Ludvig
-- 
* SuSE CR, s.r.o     * mludvig@suse.cz
* (+420) 296.545.373 * http://www.suse.cz
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